种植体-天然牙联合支持的套筒冠义齿修复下颌多牙缺失的三维有限元分析

发布时间：2018-03-09 04:26

本文选题：种植体-天然牙联合支持　切入点：套筒冠　出处：《暨南大学学报(自然科学与医学版)》2017年02期 　论文类型：期刊论文

【摘要】：目的:分析比较仅由天然牙支持的套筒冠覆盖义齿和种植体-天然牙联合支持的套筒冠覆盖义齿修复下颌多数牙缺失时基牙、牙周膜、牙槽骨、义齿及义齿下黏膜的应力分布情况.方法:通过三维有限元分析法,建立2个生物力学模型:仅由2颗尖牙支持的套筒冠义齿修复下颌缺失牙模型(Model 1)和由种植体-天然牙联合支持的套筒冠义齿修复下颌缺失牙模型(Model 2),在垂直载荷下分析比较2种套筒冠义齿基牙、牙周膜、牙槽骨、义齿及义齿下黏膜的应力分布情况.结果:与Model 1相比,Model 2中基牙的位移、基牙及其周围牙周膜、牙槽骨、修复体及修复体下方的黏膜所受的应力均减小,而种植体所受的应力较大.结论:在游离端缺牙区补充性地植入2枚种植体,并与天然牙联合支持套筒冠义齿对多数缺失牙进行修复,可保护余留牙及其周围支持组织,可减轻修复体所承担的应力,从生物力学的角度来说是一种有价值的修复手段.
[Abstract]:Objective: to analyze and compare the restoration of abutment, periodontal ligament and alveolar bone with implant-natural denture supported by implant-natural crown overdenture and implant-natural crown overdenture. Stress distribution of denture and subdenture mucosa. Two biomechanical models were established: model 1 for restoration of mandibular missing teeth with only 2 canine crown dentures and model 2 for restoration of mandibular missing teeth with implant-natural denture. The abutment teeth of two kinds of sleeve crown dentures were analyzed and compared with each other. Stress distribution of periodontal ligament, alveolar bone, denture and subdenture mucosa. Results: compared with Model 1, the displacement of abutment, the stress of abutment and its surrounding periodontal ligament, alveolar bone, prosthesis and the mucosa beneath prosthesis were decreased. Conclusion: two implants were implanted in the free end region of the implant, and the prostheses were supported by the crown denture of natural teeth, which can protect the residual teeth and their surrounding supporting tissues. It can reduce the stress of the prosthesis and is a valuable method from the biomechanical point of view.
【作者单位】：重庆医科大学附属口腔医院;口腔疾病与生物医学重庆市重点实验室;重庆市高校市级口腔生物医学工程重点实验室;
【基金】：国家自然科学基金项目(31100690;11402042) 重庆市基础与前沿研究计划项目(cstc2015jcyjA10027) 重庆市卫生计生委资助重点项目(20141012)
【分类号】：R783.6

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